Locomotives is the definitive photographic reference for the North American rail fan. It covers all mainline locomotive models built for North American railroads from the mid-1970s onward. This revised and expanded edition includes data on all the new locomotive models built from 2007 to January 2023, including the latest Tier 4 freight locomotives and electric and diesel-electric passenger locomotives from Siemens. This latest edition also includes production model upgrades and "D.C. to A.C." modernizations by the major locomotive builders. Containing 32 new pages, and over 300 photographs of more than 120 models, this remarkable large-format reference covers every major North American locomotive manufacturer as well as North American passenger locomotives imported from Europe. Greg McDonnell provides concise yet comprehensive information on each model, along with easy-to-read tables of production totals, build dates and mechanical specifications. AUTHOR: Greg McDonnell is the author of 10 books on a wide range of transportation subjects and a professional photojournalist for railroad publications in the United States and Canada. He received the Railway and Locomotive Historical Society's Fred A. and Jane R. Stindt Photography Award for significant contribution to the photographic interpretation of North America's railroading history. He lives in Cambridge, Ontario.